3 • The Doppler Effect

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8 Terms

1
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Define Doppler Effect

The apparent change in the frequency of a wave due to the motion of the source or observer

2
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<p>Label This Diagram</p><p><em>The Doppler Effect</em></p>

Label This Diagram

The Doppler Effect

a - observer

b - source

c - crest 1

d - crest 2

e - crest 3

3
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<p>Label This Formula</p><p><em>The Doppler Effect</em></p>

Label This Formula

The Doppler Effect

f’ - apparent frequency

c - speed of wave / light

f - actual frequency

v - speed of source

+ - moving away

- - moving towards

4
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What page of the log tables can you find the Doppler Effect formula?

59

5
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Name 2 uses of the doppler effect

  • Garda speed guns

  • Red shift of stars to measure their speeds

6
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Demonstrate the doppler effect • 1

  • Mount bicycle wheel on a frame

  • Attach buzzer of a single frequency and a battery to the rim

7
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Demonstrate the doppler effect • 2

  • Turn on buzzer

  • Observed frequency = source frequency

8
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Demonstrate the doppler effect • 3

  • Spin wheel quickly

  • Observed frequency increases and decreases - Doppler effect